159results about How to "Increase signal level" patented technology

An electrode for collecting surface electromyographic (EMG) signals consists of a generally bolt-shaped structure having a circular signal-gathering head and an integral shaft for support purposes and for transmission of electrical signals. The head of the electrode is configured as a disc having a plurality of pyramids distributed substantially evenly over the signal gathering surface with the tips of the pyramids projecting outwardly of the head for contact with the skin of a patient. Preferably, the electrode consists entirely of 316L stainless steel, the pyramids are formed by grinding or electromachining and the shaft is threaded for receipt of a clamp nut. The electrode is adapted for mounting in a hole in a thin, flexible support member by means of the shaft to maintain spacing among adjacent electrodes and to assure proper contact with the patient.

A heated DESI spray device provides improved resolution or control of analyte desorption at a target locus on a sample. Heating controls spot size and enhances resolution in an imaging mode without impairing signal level. Additionally or alternatively the heated DESI spray may control desorption kinetics of a target analyte or otherwise control analyte discrimination in detection mode. One embodiment of the DESI spray is heated by heating nebulizing gas that accompanies the electrosprayed solvent. Another embodiment heats a separate gas stream that transports or directs desorbed material to the ion aperture of an analysis instrument. Heating may reduce size of primary droplets, alter the impact dynamics or the energy delivered by the spray to the surface, reduce size of secondary droplets and/or assure desolvation, improve species selectivity or otherwise affect sampling and enhance the ion signal level.

It is an object to decrease the number of transistors connected to a capacitor. In a structure, a capacitor and one transistor are included, one electrode of the capacitor is connected to a wiring, and the other electrode of the capacitor is connected to a gate of the transistor. Since a clock signal is input to the wiring, the clock signal is input to the gate of the transistor through the capacitor. Then, on/off of the transistor is controlled by a signal which synchronizes with the clock signal, so that a period when the transistor is on and a period when the transistor is off are repeated. In this manner, deterioration of the transistor can be suppressed.

An improved transmitter apparatus, a receiver apparatus and a base station implemented with the transmitter and receiver apparatuses are described. These apparatuses and the base station serves to establish communication by making use of an orthogonal frequency division demultiplexing demodulation and an inverse spectrum spreading demodulation in combination. The communication coverage thereof can be expaned by making use of an orthogonal frequency division demultiplexing demodulation and an inverse spectrum spreading demodulation in combination.

Disclosed is a switching-type constant current power supply, which comprises an alteration circuit 9 provided on the output side of a power conversion circuit 3 together with a voltage detection circuit 7, and a feedback circuit 8 provided between the voltage detection circuit 7, a current detection circuit 5 and a control circuit 4. The alteration circuit 9 is operable, during a current flow period where a load current IL is flowing, to set the signal level of a second feedback signal F2 at a value less than a reference voltage Vref to be supplied to a common error amplifier EA1 in a control circuit 4, and operable, during a current cut-off period where the load current IL is not flowing, to set the signal level of the second feedback signal F2 at a value greater than the reference voltage Vref During the current cut-off period, the feedback circuit 8 is operable to supply the second feedback signal F2 to the control circuit 4 so as to substantially discontinue the operation of the power conversion circuit 3. The switching-type constant current power supply of the present invention can stabilize the load current even under the condition that a load (e.g. display including LEDs) is repeatedly turned on and off.

A diagnostic method and associated system includes the steps of exposing at least one sample location with excitation radiation through a single optical waveguide or a single optical waveguide bundle, wherein the sample emits emission radiation in response to the excitation radiation. The same single optical waveguide or the single optical waveguide bundle receives at least a portion of the emission radiation from the sample, thus providing co-registration of the excitation radiation and the emission radiation. The wavelength of the excitation radiation and emission radiation is synchronously scanned to produce a spectrum upon which an image can be formed. An increased emission signal is generated by the enhanced overlap of the excitation and emission focal volumes provided by co-registration of the excitation and emission signals thus increasing the sensitivity as well as decreasing the exposure time necessary to obtain an image.

A biometric image pickup apparatus includes: a light source section selectively switching between light of a first wavelength region with a high transmittance through a living organism and light of a second wavelength region with a lower transmittance through the living organism than light of the first wavelength region to apply the light of the first wavelength region and the light of the second wavelength region to the living organism; an image pickup lens section condensing light from the living organism; an image pickup device obtaining first image pickup data of the living organism on the basis of the light of the first wavelength region in light condensed by the image pickup lens, and obtaining second image pickup data on the basis of the light of the second wavelength region in the light condensed by the image pickup lens.

In magnetic resonance data acquisition, decoupling between the transmit and receive coils is achieved by using a transmit array system wherein induced currents from the transmit coils cancel each other, resulting in a total of zero current in the receive coil. Forward and reversed polarized transmit coil pairs are set to cancel the individual currents of each other, or of a receive coil. Linearly polarized fields can also be used to effect the decoupling. The decoupling allows the magnetic resonance data acquisition system to be operated for concurrent excitation of the nuclear spins and reception of the resulting magnetic resonance signals.

A wireless valve-position monitor includes a housing having a plurality of possible antenna module mounting ports. A position sensor is within the housing that interfaces to a movable portion of a process-control valve for providing a position detection signal that reflects a position of the process-control valve. A wireless transceiver system including a transceiver coupled to an antenna module is coupled to the position sensor for transmitting a wireless signal that communicates the position of the process-control valve. The antenna module is mounted to one of the plurality of possible mounting ports on the housing.

To provide an optical filter switching device for a camera in which a clear image can always be obtained during the day and at night.

In a cameral in which an image is formed on an image pick-up element (2) through a lens (1a) provided on a camera body (1) and is converted into an electric signal through the image pick-up element (2), thereby obtaining an image signal, optical filter switching means (3) for switching optical filters (3a) and (3b) depending on a level of the image signal is provided on a front surface of the image pick-up element (2) and a clear image can always be obtained during the day and at night. Therefore, in the case in which such a camera is used for a surveillance camera, the reliability of a monitoring system can be enhanced.

This Passive Long Range Acoustical Sensor relates to means of sensing acoustical sources and signals, including multi-channel acoustical signals, such as various types of sounds, vibrations, flutter, turbulence, and the like, and at long distances through a natural optical channel, without the use of a laser or other artificial illuminating means. A modified multi-channel embodiment of the Passive Long Range Acoustical Sensor may use a combination of natural optical channels and active illumination means, such as laser or other artificial illuminating means, of producing additional optical channels.

A networked computing system that is configured to optimize short-range wireless communications within a distributed wireless communications network. The networked computing system may include one or more base stations, a transceiver device having shorter range wireless communications capability than the base station(s), and one or more user equipment capable of communicating with the transceiver device and the base station(s). Within the networked computing system, the transceiver device is configured to: transmit a signal to detect a regional base station and then determine at least one operating parameter based on communications characteristics associated with the detected regional base station(s). The operating parameter(s) may be a non-interfering operating power levels or a modulation and coding scheme level utilized to facilitate communications between the transceiver device and the user equipment.

An optical device includes: a substrate having a dielectric layer and a plurality of metal particles; and an organic molecular layer formed by self-assembly on at least either the surface of the dielectric layer or the surfaces of the metal particles. In the organic molecular layer, a first organic molecule and a second organic molecule are alternately arranged in a first direction, and the chain length of an organic group of the first organic molecule and the chain length of an organic group of the second organic molecule are different from each other.

Pulse-width-modulating class D amplifier with an H-bridge output stage, and method of operating the same. in which output stage dead-time is compensated. Offset logic circuitry detects various dead-time-related conditions at push-pull output drivers, and generates an offset signal applied to the amplified differential input signal, to adjust the time at which the voltage at differential signal lines crosses a ramp reference waveform. The offset signal can correspond to the duration of a disturbance (dead-time at one driver in combination with an active signal at the active driver), or the sum of that disturbance duration with a dead-time at the active driver. The offset signal is generated by charging a capacitor for the duration of this disturbance, or disturbance plus dead-time. According to another approach, error is reduced by charging a capacitor for each transition of the signal for a duration of the dead-time of the active driver. Total harmonic distortion is reduced without requiring increased circuit complexity and without shortening the dead-time to unsafe margins.

A diagnostic imaging arrangement comprises a magnetic resonance examination (1) system to acquire magnetic resonance signals and an emission tomography system (2) to acquire nuclear decay signals. An analysis module (4) is provided to derive motion correction(s) from the magnetic resonance signals. A reconstruction module (5) reconstructs a motion corrected emission tomographic image from the nuclear decay signals on the basis of the motion correction. Also a therapeutic arrangement is disclosed with a diagnostic imaging arrangement and a therapy module, with a system controller is further coupled to the therapy module and has the function to control the therapy module on the basis of image information generated by the diagnostic imaging system.